/*
 * Copyright (C) 2008 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.cordova.plugins.leanit.qrcode.decoding;

import java.util.Vector;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

import com.cordova.plugins.leanit.qrcode.CaptureActivity;
import com.cordova.plugins.leanit.qrcode.camera.CameraManager;
import com.cordova.plugins.leanit.qrcode.view.ViewfinderResultPointCallback;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;

import io.cordova.qrcodeTraceMobile.R;


/**
 * This class handles all the messaging which comprises the state machine for
 * capture.
 *
 * @author dswitkin@google.com (Daniel Switkin)
 */
public final class CaptureActivityHandler extends Handler {

	private static final String TAG = CaptureActivityHandler.class
			.getSimpleName();

	private final CaptureActivity activity;
	private final DecodeThread decodeThread;
	private State state;

	private enum State {
		PREVIEW, SUCCESS, DONE
	}

	public CaptureActivityHandler(CaptureActivity activity,
								  Vector<BarcodeFormat> decodeFormats, String characterSet) {
		this.activity = activity;
		decodeThread = new DecodeThread(activity, decodeFormats, characterSet,
				new ViewfinderResultPointCallback(activity.getViewfinderView()));
		decodeThread.start();
		state = State.SUCCESS;

		// Start ourselves capturing previews and decoding.
		CameraManager.get().startPreview();
		restartPreviewAndDecode();
	}

	@Override
	public void handleMessage(Message message) {

		switch (message.what) {
			case R.id.auto_focus:
				//Log.d(TAG, "Got auto-focus message");
				// When one auto focus pass finishes, start another. This is the closest thing to
				// continuous AF. It does seem to hunt a bit, but I'm not sure what else to do.
				if (state == State.PREVIEW) {
					CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
				}
				break;
			case R.id.restart_preview:
				Log.d(TAG, "Got restart preview message");
				restartPreviewAndDecode();
				break;
			case R.id.decode_succeeded:
				Log.d(TAG, "Got decode succeeded message");
				state = State.SUCCESS;
				Bundle bundle = message.getData();
				Bitmap barcode = bundle == null ? null :
						(Bitmap) bundle.getParcelable(DecodeThread.BARCODE_BITMAP);
				activity.handleDecode((Result) message.obj, barcode);
				break;
			case R.id.decode_failed:
				// We're decoding as fast as possible, so when one decode fails, start another.
				state = State.PREVIEW;
				CameraManager.get().requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
				break;
			case R.id.return_scan_result:
				Log.d(TAG, "Got return scan result message");
				activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
				activity.finish();
				break;
			case R.id.launch_product_query:
				Log.d(TAG, "Got product query message");
				String url = (String) message.obj;
				Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
				intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
				activity.startActivity(intent);
				break;
		}





	}

	public void quitSynchronously() {



		state = State.DONE;
		CameraManager.get().stopPreview();
		Message quit = Message.obtain(decodeThread.getHandler(),  R.id.quit);
		quit.sendToTarget();
		try {
			decodeThread.join();
		} catch (InterruptedException e) {
			// continue
		}

		// Be absolutely sure we don't send any queued up messages
		removeMessages(R.id.decode_succeeded);
		removeMessages(R.id.decode_failed);
	}

	private void restartPreviewAndDecode() {
		if (state == State.SUCCESS) {
			state = State.PREVIEW;
			CameraManager.get().requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
			CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
			activity.drawViewfinder();
		}
	}

}
